I was asked today "How long can I sell and rent back for?" from a man who called up looking to sell and rent back his property. He wanted to sell and rent back as he had mounting debts left to him from a past relationship he wanted to clear with the equity in his house. He wanted to remain in his property though as he said it was his home not just his house.
I told him that he could rent back for as long as he required whether that was months, years, decades. I also told him that he has the option to remain there renting or he could rent and have the option in the future to buy back. Either way the choice was his. He told me he liked the option of buying back as this helped him feel more secure and give him something to works towards in the future.